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Orbital eccentricityKepler's equationKepler orbitMean anomalyEccentricityParabolic trajectoryLongitude of the periapsisElliptic orbitOsculating orbitApse lineEuclidean vectorPolar coordinate systemEccentric anomalyOrbit equationPeriapsisPolar coordinatesTangential angleElliptic coordinate systemDirection cosineSpherical angleCoordinate systemEarth ellipsoidEllipseEuler's formulaEllipticityVector fieldRadianOrbitParameterCartesian coordinatesSemi-major and semi-minor axesDistance from a point to a planeDimensionLagrangian functionEllipsoidal coordinatesRadius vectorOrientationAngle of rotationEuler spiralConfiguration spaceToroidal coordinatesAtan2Radial functionPrincipal axis theoremEuler's rotation theoremEuclidean topologyOsculating planeCartesian coordinate systemConic constantGyrationTangential quadrilateralVector productElectromagnetic tensorCenter of curvatureSpherical coordinatesCenter of massTangential and normal componentsSpherical trigonometryAngular momentumEuclidean spaceSubtended angleAngular diameterRotation of axesScalar productEinstein field equationFour-vectorEigenspaceAxial ratioEuler angleEllipsoidSkew gradientDistortionEuler's three-body problemGeometric multiplicityPlanetary coordinate systemCalculus on euclidean spaceDivergenceDimensional analysisEinstein tensorMetric tensorOrthogonal diagonalizationPerpendicular distanceAstrological aspectGauss mapLocal tangent plane coordinatesSectional curvatureDiameterSpherical sectorMultipole expansionCurlTangential polygonPtolemy's inequalityEpicycloidLog-polar coordinatesCoordinateTangent spaceOrthogonal groupAltitudeDirac equation in curved spacetimeEigenvalue perturbation